Spicy New Toothpaste

I was in for a hot surprise last weekend while in Minnesota for my niece’s graduation. Preparing for bed the first night, I grabbed my travel tube of toothpaste from my toiletry bag and proceeded to brush my teeth. The taste startled me and soon my mouth was on fire. I spit the substance out and rinsed my mouth. I wondered what happened as this didn’t taste the same as last weekend when I was also traveling. I looked at the tube and saw Icy Hot. Good grief! Would Nell do something like this or is it classic Mary Grace?